No.148 Tongzhou District Popularity Ranking Beijing No.28 Zhong Engineering No.31 Construction Machinery No.45 Complete Equipment No.48 Machinery Manufacturing No.80 Zhuan Yong Equipment No.91 Machinery Electromechanical Equipment Equipment Manufacturing Tuo Pump Hun Ning Tu Tuo Pump Lu Mian Xi Planers Machines Transportation Equipment 理事单位 科技型中小企业 中关村高新技术企业 市科技型中小企业 高新技术企业 省级高新技术企业 市级高新技术企业